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Reports utility classes with <code>public</code> constructors.
<p>Utility classes have all fields and methods declared as <code>static</code>. Creating a <code>public</code>
  constructor in such classes is confusing and may cause accidental class instantiation.</p>
<p><b>Example:</b></p>
<pre><code>
  public final class UtilityClass {
    public UtilityClass(){
    }
    public static void foo() {}
  }
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  public final class UtilityClass {
    private UtilityClass(){
    }
    public static void foo() {}
  }
</code></pre>
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